控制电源 时间继电器的电源端子间一般能承受1500V的外来浪涌电压,如果浪涌电压超过此值时,须使用浪涌吸收装置,以防止时间继电器击穿烧毁; 当时间继电器重复工作时,本次电源关断到下次电源接通的时间(休止时间)必须大于复位时间,否则,未完全复位的时间继电器在下一次工作时就会产生延时时间偏移、瞬动或不动作; 断电延时型时间继电器的电源接通时间必须大于0.5秒,以便有充足的能量储备而保证在断开电源后按预设时间接通或分断负载; 时间继电器的电源回路一般情况下是高阻抗的,因此,切断电源后的漏电流要尽可能小(半导体或用RC并接的触点来开关时间继电器),以免有感应电压而假关断引起误动作(对于断电延时型而言,会产生断电后延时时间到但继电器不释放现象)。一般情况下电源端子的残留电压应小于额定电压的20%,对断电延时型而言应小于额定电压的7%;
时间继电器在完成其控制工作后,尽量避免继续通电。到时后连续通电会使产品发热,从而加快电子元件老化,大大缩短使用寿命。
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